Even now, we are over-specialized (Medical General Practitioners are still difficult to find) to an amazing degree. One of his predictions was that the computer (geeks cheer now) will take over the metaphysics of humankind. Now the internet makes general knowledge much more accessible and widespread, so that human beings are becoming more and more generalists, Leonardos if you will.
Identity is no longer tangled up with the kind of work one performs. National borders are becoming impossible to maintain. The disappearance of borders of all kinds is the way for humanity to survive, he says, and we are witnessing the greatest dissolving of differences among groups in human history.
Many would argue against this, fearing the re-taking of the world reins by the hidden masters who reigned in the 19th Century, but I doubt they can do it. There is an inexorable flow of energy from specialization to adaptability, from sovereignty to liquidity of human movement, from separation to unity amongst human beings.